it is an emotional spot mentioning the sandy hook massacre and featuring roxanna green, a mother of one of the victims killed during the tucson shooting two years ago. here's a look. >> my 9-year-old dur was murdered in the tucson shooting. i have one question for our political leaders. when will you find the courage to stand up to the gun lobby? >> that's part of the demand a plan campaign paid for by bloomberg's group, mayors against illegal guns. it is set to start airing in tucson just after 10:00 a.m. that's the same time of the shooting that nearly killed former rep gabby giffords. it will air in denver, milwaukee, and roanoke. >>> meanwhile a california democrat is planning a set of rare town hall meetings to discuss gun violence this week. rep mike thompson is the leader of the house democratic task force formed in the wake of the newtown connecticut shooting. he is hosting three gun violence prevention forums in northern california where he will enlist experts from law enforcement mental health, schools and local elected officials. this is a chance for thompson to discuss a wid